a bicycle store costs $3600 per month to operate .The store pays an average $80 per bike . The average selling price of each bicycle is $120. How many bicycles must the store sell each month to break even?

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .

What is the absolute value of -100000000000000?